CN109283967A - A kind of micro-control unit MCU clock correcting method and relevant device - Google Patents
A kind of micro-control unit MCU clock correcting method and relevant device Download PDFInfo
- Publication number
- CN109283967A CN109283967A CN201811384477.9A CN201811384477A CN109283967A CN 109283967 A CN109283967 A CN 109283967A CN 201811384477 A CN201811384477 A CN 201811384477A CN 109283967 A CN109283967 A CN 109283967A
- Authority
- CN
- China
- Prior art keywords
- clock
- value
- frequency
- mcu
- mcu clock
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/04—Generating or distributing clock signals or signals derived directly therefrom
- G06F1/08—Clock generators with changeable or programmable clock frequency
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/04—Generating or distributing clock signals or signals derived directly therefrom
- G06F1/14—Time supervision arrangements, e.g. real time clock
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Debugging And Monitoring (AREA)
- Electric Clocks (AREA)
Abstract
The embodiment of the present application provides a kind of micro-control unit MCU clock correcting method and relevant device, for improving the precision and stability of MCU clock.The embodiment of the present application method includes: to determine target time section using a reference source clock；The counting number in the target time section is calculated using the frequency of MCU clock, is denoted as the first numerical value；The counting number in the target time section is calculated using the frequency of a reference source clock, is denoted as second value；The frequency of the MCU clock is adjusted according to first numerical value and the second value.Therefore, the frequency of the MCU clock is adjusted by first numerical value and the second value, i.e., MCU clock is calibrated using the reference clock that a reference source clock is used as calibration MCU clock, the precision and stability of MCU clock can be improved.
Description
Technical field
This application involves electronic information fields more particularly to a kind of micro-control unit MCU clock correcting method and correlation to set
It is standby.
Background technique
Micro-control unit (Microcontroller Unit；MCU), also known as one chip microcomputer or single-chip microcontroller are
The frequency of central processing unit and specification are done appropriate reduction, and by memory, counter, USB, A/D conversion, UART, PLC, DMA etc.
Perimeter interface or even LCD driving circuit all integrate the computer for forming chip-scale on a single chip, are different applied fields
Various combination control is done in conjunction.
In MCU, clock is important a composition part, is the equal of the heart of MCU, the precision of clock can be direct
Influence function and the stability etc. of product.Such as: when MCU and other equipment carry out UART communication, the precision of clock can be direct
Influence the correct transmitting-receiving of communication data.
However, the internal clocking that actual conditions are MCU can generate certain temperature drift with the variation of environment temperature, temperature drift
Cause the error of clock that may be up to ± 20% even more greatly, when this error precision generated by temperature drift is far beyond MCU
The permitted normal range (NR) of clock error causes product function to occur abnormal.
Apply for content
The embodiment of the present application provides a kind of micro-control unit MCU clock correcting method and relevant device, for improving MCU
The precision and stability of clock.
The embodiment of the present application first aspect provides a kind of micro-control unit MCU clock correcting method, comprising:
Target time section is determined using a reference source clock；
The counting number in the target time section is calculated using the frequency of MCU clock, is denoted as the first numerical value；
The counting number in the target time section is calculated using the frequency of a reference source clock, is denoted as the second number
Value；
The frequency of the MCU clock is adjusted according to first numerical value and the second value.
Optionally, the frequency for adjusting the MCU clock according to first numerical value and the second value includes:
If first numerical value is greater than the second value, the frequency of the MCU clock is reduced；
If first numerical value is less than the second value, increase the frequency of the MCU clock.
Optionally, the frequency using MCU clock calculates the counting number in the target time section, is denoted as first
Numerical value specifically includes:
Obtain the maximum value and minimum value in the register effective range of the MCU clock；
Intermediate value is determined using dichotomy according to the maximum value and minimum value；
The register is set according to the intermediate value, obtains the frequency of the MCU clock；
The counting number in the target time section is calculated using the frequency of MCU clock, is denoted as the first numerical value.
Optionally, the frequency for adjusting the MCU clock according to first numerical value and the second value is specifically wrapped
It includes:
Obtain calibration cycle and calibration error；
In the calibration cycle, it is described to judge whether the numerical error of first numerical value and the second value meets
Standard error；
If it is not, the register of the MCU clock is then adjusted, to adjust the frequency of the MCU clock.
The embodiment of the present application second aspect provides a kind of micro-control unit MCU clock alignment system, comprising:
Determination unit, for determining target time section using a reference source clock；
First computing unit, for using the frequency of MCU clock to calculate the counting number in the target time section, note
For the first numerical value；
Second computing unit, for using the frequency of a reference source clock to calculate the counting in the target time section
Number is denoted as second value；
Adjustment unit, for adjusting the frequency of the MCU clock according to first numerical value and the second value.
Optionally, the adjustment unit is specifically used for:
If first numerical value is greater than the second value, the frequency of the MCU clock is reduced；
If first numerical value is less than the second value, increase the frequency of the MCU clock.
Optionally, first computing unit is specifically used for:
Obtain the maximum value and minimum value in the register effective range of the MCU clock；
Intermediate value is determined using dichotomy according to the maximum value and minimum value；
The register is set according to the intermediate value, obtains the frequency of the MCU clock；
The counting number in the target time section is calculated using the frequency of MCU clock, is denoted as the first numerical value.
Optionally, second computing unit is specifically used for:
Obtain calibration cycle and calibration error；
In the calibration cycle, it is described to judge whether the numerical error of first numerical value and the second value meets
Standard error；
If it is not, the register of the MCU clock is then adjusted, to adjust the frequency of the MCU clock.
The embodiment of the present application third aspect provides a kind of computer installation, comprising:
Processor, memory, input-output equipment and bus；
The processor, memory, input-output equipment are connected with the bus respectively；
The processor is for executing method as in the foregoing embodiment.
The embodiment of the present application fourth aspect provides a kind of computer readable storage medium, is stored thereon with computer journey
Sequence, it is characterised in that: realize when the computer program is executed by processor such as any one of previous embodiment the method
Step.
As can be seen from the above technical solutions, the embodiment of the present application has the advantage that in the present embodiment, utilizes a reference source
Clock determines target time section；The counting number in the target time section is calculated using the frequency of MCU clock, is denoted as first
Numerical value；The counting number in the target time section is calculated using the frequency of a reference source clock, is denoted as second value；Root
The frequency of the MCU clock is adjusted according to first numerical value and the second value.Therefore, by first numerical value and described
Second value adjusts the frequency of the MCU clock, i.e., the reference clock pair of calibration MCU clock is used as using a reference source clock
MCU clock is calibrated, and the precision and stability of MCU clock can be improved.
Detailed description of the invention
Fig. 1 is an a kind of schematic diagram of micro-control unit MCU clock correcting method embodiment in the embodiment of the present application；
Fig. 2 is a kind of another schematic diagram of micro-control unit MCU clock correcting method embodiment in the embodiment of the present application；
Fig. 3 is a kind of another schematic diagram of micro-control unit MCU clock correcting method embodiment in the embodiment of the present application；
Fig. 4 is a kind of another schematic diagram of micro-control unit MCU clock correcting method embodiment in the embodiment of the present application；
Fig. 5 is an a kind of schematic diagram of micro-control unit MCU clock alignment system embodiment in the embodiment of the present application；
Fig. 6 is an a kind of schematic diagram of computer installation embodiment in the embodiment of the present application.
Specific embodiment
The embodiment of the present application provides a kind of micro-control unit MCU clock correcting method and relevant device, for improving MCU
The precision and stability of clock.
In order to make those skilled in the art more fully understand application scheme, below in conjunction in the embodiment of the present application
Attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is only
The embodiment of the application a part, instead of all the embodiments.Based on the embodiment in the application, ordinary skill people
Member's every other embodiment obtained without making creative work, all should belong to the model of the application protection
It encloses.
The description and claims of this application and term " first ", " second ", " third ", " in above-mentioned attached drawing
Four " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so that the embodiments described herein can be in addition to illustrating herein or describing
Sequence other than appearance is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that covering is non-exclusive
Include, for example, the process, method, system, product or equipment for containing a series of steps or units are not necessarily limited to clearly arrange
Those of out step or unit, but may include be not clearly listed or it is solid for these process, methods, product or equipment
The other step or units having.
In order to make it easy to understand, the detailed process in the embodiment of the present application is described below, referring to Fig. 1, the application
A kind of one embodiment of micro-control unit MCU clock correcting method includes: in embodiment
101, target time section is determined using a reference source clock；
, can be by terminal device in the present embodiment, such as use the end product of MCU, or use computer, server
Etc. executing subject of the terminals connection MCU as the embodiment of the present application, execution determine target time section using a reference source clock.
A reference source clock is intended for the reference clock of calibration MCU internal clocking, therefore a reference source clock has to completely
Sufficient following two requirement: the temperature drift under precision height, full operating temperature is small.The reference clock can be external real-time clock (RTC,
Real_Time Clock) (such as 32.768khz or 100khz etc.), it is also possible to the low-speed clock inside MCU (if in MCU
When there are precision height and temperature drift small low-speed clock in portion).Specifically, using clock reference source clock as the clock of timer T0
One correct time section of timing is carried out as target time section (10ms, 100ms or 1s or other time) in source.
102, the counting number in the target time section is calculated using the frequency of MCU clock, is denoted as the first numerical value；
In the present embodiment, terminal calculates the counting number in the target time section using the frequency of MCU clock, is denoted as
First numerical value.
Specifically, select MCU clock as the clock source of timer T1, to facilitate in statistics a period of time T1 to current
The counting number of MCU clock counts, in a step 102 in the timer T0 timed period timer T1 in current MCU
The counting number curCntVal of portion's clock, is denoted as the first numerical value.
103, the counting number in the target time section is calculated using the frequency of a reference source clock, is denoted as second
Numerical value；
In the present embodiment, terminal calculates the counting in the target time section using the frequency of a reference source clock
Number, is denoted as second value.
Specifically, in a reference source clock timer T0 timed period, use of the MCU timer T1 to MCU clock
The counting number VREFCNTVAL of the frequency of a reference source clock, is denoted as second value.
104, the frequency of the MCU clock is adjusted according to first numerical value and the second value.
In the present embodiment, when terminal is adjusted MCU with specific reference to the numerical values recited relationship of the first numerical value and second value
The frequency of clock.
Specifically, the frequency of MCU clock can be adjusted by the clock triming register of MCU.Wherein,
It is vertical to compare current MCU clock frequency count value the first numerical value curCntVal and MCU clock object frequency count second
The size of VREFCNTVAL, to determine the adjustment direction of clock triming register.
In the present embodiment, target time section is determined using a reference source clock；It is calculated using the frequency of MCU clock in the mesh
The counting number in the period is marked, the first numerical value is denoted as；It is calculated using the frequency of a reference source clock in the object time
Counting number in section, is denoted as second value；The frequency of the MCU clock is adjusted according to first numerical value and the second value
Rate.Therefore, the frequency of the MCU clock is adjusted by first numerical value and the second value, that is, uses a reference source clock
The reference clock for being used as calibration MCU clock calibrates MCU clock, and the precision and stability of MCU clock can be improved.
In the embodiment of the present application, step 104 adjusts the MCU clock according to first numerical value and the second value
There are many modes of frequency, specifically can be according to the numerical relation between the first numerical value and second value come when carrying out MCU
The adjustment of clock frequency.Below referring to Fig. 2, based on embodiment described in Fig. 1, when a kind of micro-control unit MCU of the embodiment of the present application
In another embodiment of clock calibration method, step 104 be can specifically include:
If 201, first numerical value is greater than the second value, the frequency of the MCU clock is reduced；
In the present embodiment, if terminal determines that the first numerical value is greater than second value, illustrate current MCU clock frequency ratio benchmark
The target frequency of source clock greatly, will need at this time to reduce the value of (or increase) clock triming register to reduce in current MCU
Portion's clock frequency.
If 202, first numerical value is less than the second value, increase the frequency of the MCU clock.
In the present embodiment, if terminal determines that the first numerical value is less than second value, illustrate current MCU clock frequency ratio benchmark
The target frequency of source clock wants small, needs to increase the value of (or reduction) clock triming register at this time to improve in current MCU
Portion's clock frequency.
In addition, in the present embodiment, if the first numerical value is equal to second value, illustrating current MCU internal clock frequencies etc.
In the target frequency of a reference source clock, the value of corresponding clock triming register is a reference source clock object frequency at this time
Corresponding triming value, does not need to change.
In the embodiment of the present application, since day and night temperature is big, very big etc. factors objective reality of the north and south region temperature difference, and produce
The power-on time point of product with power on region be it is uncertain, therefore environment temperature of the MCU when just powering on be it is uncertain, exactly
Environment temperature is uncertain so that MCU internal clocking temperature drift is not known yet when powering on when due to powering on, in fact it could happen that when just powering on
The very big situation of MCU internal clocking temperature drift；Therefore the present invention when MCU is powered on by using " dichotomy " mechanism come in MCU
Portion's clock is calibrated, and MCU internal clocking quickly can be calibrated to target frequency, and " dichotomy can with " be utilized to obtain
With the optimal matching frequency point of target frequency.Below referring to Fig. 3, based on embodiment described in Fig. 1 or Fig. 2, the embodiment of the present application one
In another embodiment of kind micro-control unit MCU clock correcting method, step 102 be can specifically include:
301, the maximum value and minimum value in the register effective range of the MCU clock are obtained；
In the present embodiment, terminal obtains the maximum value and minimum value in the register effective range of the MCU clock.
Specifically, the acquisition process in this step can be acquired by way of receiving third party's terminal and sending,
It can be acquired by inquiring the datasheet of MCU, can also be that other way acquires, herein without limitation.To look into
For the datasheet for asking MCU, it can determine that the valid value range of the clock triming register of the MCU is [a, b], wherein
A is the minimum value of clock triming register virtual value, and b is the maximum value of clock triming register virtual value.
302, intermediate value is determined using dichotomy according to the maximum value and minimum value；
In the present embodiment, terminal determines intermediate value using dichotomy according to the maximum value and minimum value.
303, the register is arranged according to the intermediate value, obtains the frequency of the MCU clock；
In the present embodiment, the register is arranged according to the intermediate value in terminal, obtains the frequency of the MCU clock.
304, the counting number in the target time section is calculated using the frequency of MCU clock, is denoted as the first numerical value.
In the present embodiment, the counting number in the target time section is calculated using the frequency of MCU clock, is denoted as first
Numerical value.
Specifically, the process of step 302-- step 304 can recycle execution, i.e., found out most using the mode of dichotomy
Excellent solution.Firstly, setting 3 variables minTrim, midTrim, maxTrim；Wherein minTrim=a, maxTrim=b,
MidTrim=(maxTrim+minTrim)/2=(a+b)/2；By the clock Triming register of the value write-in MCU of midTrim
In, it then substitutes into Fig. 1 embodiment or Fig. 2 embodiment, by calibration, obtains counting of the timer T1 to current MCU clock
Number curCntVal；Compare the size of the counting number VREFCNTVAL of curCntVal and a reference source clock object frequency simultaneously；
If curCntVal > VREFCNTVAL, then illustrate that the target frequency of current MCU internal clock frequencies ratio MCU internal clocking is wanted
Greatly, it needs to update the range of clock Triming register as follows: minTrim=a, maxTrim=midTrim=(a+b)/
2, midTrim=(maxTrim+minTrim)/2=(a+ (a+b)/2)/2；If curCntVal < VREFCNTVAL then illustrates
The target frequency of current MCU internal clock frequencies ratio MCU internal clocking is small, needs the range of clock Triming register
It updates as follows: minTrim=midTrim=(a+b)/2, maxTrim=b, midTrim=(maxTrim+minTrim)/2=
((a+b)/2+b)/2；After the value for having redefined minTrim, midTrim, maxTrim, by midTrim value write clock
In Triming register, the movement of step 101 in embodiment described in Fig. 1 to step 104 is repeated again, until meeting item
Until part midTrim-minTrim=maxTrim-midTrim=1, then illustrate that " dichotomy " clock alignment mechanism has been completed,
Meanwhile clock frequency corresponding to the value midTrim of final clock Triming register is just closest to a reference source clock
Target frequency.
In the present embodiment, when using " dichotomy " alignment mechanism, the period described in step 101 can be periodically smaller,
It is ms grades (such as 10ms, 15ms etc.) general, therefore the school to MCU clock can be completed in the very short time when MCU is powered on
Quasi- movement powers on the delay very little of rear function to MCU (usually can only be delayed 100ms or so).
In the embodiment of the present application, in the course of work of MCU after the power-up, operating ambient temperature can be over time
(for example diurnal temperature is different) or load change and change, but the variation of this temperature is typically all gradual change type, corresponding
Temperature drift caused by MCU internal clocking is also gradual change, MCU internal clock frequencies will not be made to mutate, but can make
MCU internal clock frequencies generate cumulative errors effect with temperature gradients, such as calibrate not in time, may result in very big mistake
Poor result occurs, therefore in the MCU course of work, it is also necessary to calibration actions are timed to its internal clocking, and it is unsuitable at this time
It is calibrated using " dichotomy " and (clock of MCU just at work can be made to generate biggish fluctuation), it should use " linear approximation
The mode of method " fine tuning calibrates MCU internal clock frequencies.Below referring to Fig. 4, based on embodiment described in Fig. 1, Fig. 2 or Fig. 3,
In a kind of another embodiment of micro-control unit MCU clock correcting method of the embodiment of the present application, step 103 specifically be can wrap
It includes:
401, calibration cycle and calibration error are obtained；
In the present embodiment, terminal obtains calibration cycle and calibration error.
Specifically, the acquisition process in this step can be acquired by way of receiving third party's terminal and sending,
Signal acquisition can be received by the input-output equipment of terminal to obtain, can also be that other way acquires, do not do herein
It limits.
In addition, for calibration cycle, due in the MCU course of work, the variation of temperature is usually gradual change and slower,
Therefore 1min or 10min even more long time period too frequently need not be typically chosen to the calibration cycle of MCU internal clock frequencies
Just carry out primary calibration, specific calibration cycle is also related with variation speed of the MCU internal clock frequencies to temperature, if temperature
Internal clock frequencies are influenced greatly, then calibration cycle will be arranged shorter, if temperature is small on internal clock frequencies influence, calibrate
Period, settable length was a little.For calibration error, the difference of actual clock frequency and benchmark source clock frequency after referring to calibration.
Typically, since there are the factors such as the adjusting step sizes of counting error, MCU clock frequency itself to make the clock after calibration
Frequency can not necessarily be equal to benchmark source clock frequency, and in this case, MCU internal clock frequencies fluctuate back and forth in order to prevent, answer
This sets calibration error in a certain range (such as ± 1% or ± 2% etc.), as long as the clock frequency error after calibration is being permitted
Perhaps within calibration error, then it is assumed that calibrate successfully.
402, in the calibration cycle, judge whether the numerical error of first numerical value and the second value meets
The standard error；
In the present embodiment, in the calibration cycle that step 401 is determined, first numerical value and second number are judged
Whether the numerical error of value meets the standard error that step 401 is determined, if so, 404 are thened follow the steps, if it is not, then executing
Step 403.
403, if it is not, then adjusting the register of the MCU clock, to adjust the frequency of the MCU clock.
In the present embodiment, when terminal determination, in the calibration cycle that step 401 is determined, first numerical value is judged
When being unsatisfactory for the standard error that step 401 is determined with the numerical error of the second value, then the MCU clock is adjusted
Register, to adjust the frequency of the MCU clock.
404, if so, executing other operations.
In the present embodiment, when terminal determination, in the calibration cycle that step 401 is determined, first numerical value is judged
When meeting the standard error that step 401 is determined with the numerical error of the second value, then terminal executes other operations, example
As continued to execute step 401-404 circulation execution in calibration cycle, it is also possible to not execute movement, can also be other behaviour
Make, herein without limitation.
Specifically, in step 403 to step 404, the example to execute, being embodied below by one can be integrated
Son is introduced.Similar to the Regulation mechanism in embodiment described in Fig. 1 to Fig. 3, when obtaining MCU timer T1 to current MCU
The counting number curCntVal of clock, while comparing the counting number of the target frequency of curCntVal and a reference source clock
The size of VREFCNTVAL.By calibration error percentage identified in step 401 (△ is 1% or 2% etc.), correspondence is calculated
Counting error △ CNTVAL=VREFCNTVAL* △；If (curCntVal-VREFCNTVAL) > △ CNTVAL, then illustrate
Current MCU clock frequency is bigger than normal, needs the value -1 of clock Triming register；(if VREFCNTVAL-curCntVal) >
△ CNTVAL then illustrates that current MCU clock frequency is bigger than normal, needs the value+1 of clock Triming register；If |
CurCntVal-VREFCNTVAL | < △ CNTVAL then illustrates current MCU clock frequency in the permitted model of target clock frequency
In enclosing, without adjusting the value of clock Triming register.After this, it after having updated clock Triming register value, repeats
Step 401 is executed to step 404, until shutdown terminates.
The embodiment of the present application is described from the angle of method above, below from the angle of virtual bench to the application
Embodiment is described, referring to Fig. 5, in the embodiment of the present application, an a kind of reality of micro-control unit MCU clock alignment system
Applying example includes:
Determination unit 501, for determining target time section using a reference source clock；
First computing unit 502, for using the frequency of MCU clock to calculate the counting in the target time section
Number, is denoted as the first numerical value；
Second computing unit 503, for using the frequency of a reference source clock to calculate in the target time section
Number is counted, second value is denoted as；
Adjustment unit 504, for adjusting the frequency of the MCU clock according to first numerical value and the second value.
In the present embodiment, determination unit 501, for determining target time section using a reference source clock；First computing unit
502, for using the frequency of MCU clock to calculate the counting number in the target time section, it is denoted as the first numerical value；Second meter
Unit 503 is calculated, for using the frequency of a reference source clock to calculate counting number in the target time section, is denoted as the
Two numerical value；Adjustment unit 504, for adjusting the frequency of the MCU clock according to first numerical value and the second value.Cause
This, the frequency of the MCU clock is adjusted by first numerical value and the second value, i.e., is used to make using a reference source clock
MCU clock is calibrated to calibrate the reference clock of MCU clock, the precision and stability of MCU clock can be improved.
As a preferred embodiment, adjustment unit 504 is specifically used for:
If first numerical value is greater than the second value, the frequency of the MCU clock is reduced；
If first numerical value is less than the second value, increase the frequency of the MCU clock.
As a preferred embodiment, the first computing unit 502 is specifically used for:
Obtain the maximum value and minimum value in the register effective range of the MCU clock；
Intermediate value is determined using dichotomy according to the maximum value and minimum value；
The register is set according to the intermediate value, obtains the frequency of the MCU clock；
The counting number in the target time section is calculated using the frequency of MCU clock, is denoted as the first numerical value.
As a preferred embodiment, the second computing unit 503 is specifically used for:
Obtain calibration cycle and calibration error；
In the calibration cycle, it is described to judge whether the numerical error of first numerical value and the second value meets
Standard error；
If it is not, the register of the MCU clock is then adjusted, to adjust the frequency of the MCU clock.
Micro-control unit MCU clock alignment system a kind of in the embodiment of the present application is carried out from modular device above
Description, below hardware device the computer installation in the embodiment of the present application is described, referring to Fig. 6, the embodiment of the present application
One specific embodiment of middle computer installation includes:
The device 600 can generate bigger difference because configuration or performance are different, may include one or more
Central processing unit (central processing units, CPU) 601 (for example, one or more processors) and storage
Device 605 is stored with one or more application program or data in the memory 605.
Wherein, memory 605 can be volatile storage or persistent storage.The program for being stored in memory 605 can wrap
One or more modules are included, each module may include to the series of instructions operation in server.Further, in
Central processor 601 can be set to communicate with memory 605, and a series of fingers in memory 605 are executed on intelligent terminal 600
Enable operation.
The device 600 can also include one or more power supplys 602, one or more wired or wireless networks
Interface 603, one or more input/output interfaces 604, and/or, one or more operating systems, such as
Windows ServerTM, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM etc..
Processor 601 is specifically used for executing following steps:
Target time section is determined using a reference source clock；
The counting number in the target time section is calculated using the frequency of MCU clock, is denoted as the first numerical value；
The counting number in the target time section is calculated using the frequency of a reference source clock, is denoted as the second number
Value；
The frequency of the MCU clock is adjusted according to first numerical value and the second value.
It is described that the MCU clock is adjusted according to first numerical value and the second value as a preferred embodiment
Frequency includes:
If first numerical value is greater than the second value, the frequency of the MCU clock is reduced；
If first numerical value is less than the second value, increase the frequency of the MCU clock.
As a preferred embodiment, the frequency using MCU clock calculates the counting in the target time section
Number, is denoted as the first numerical value and specifically includes:
Obtain the maximum value and minimum value in the register effective range of the MCU clock；
Intermediate value is determined using dichotomy according to the maximum value and minimum value；
The register is set according to the intermediate value, obtains the frequency of the MCU clock；
The counting number in the target time section is calculated using the frequency of MCU clock, is denoted as the first numerical value.
It is described that the MCU clock is adjusted according to first numerical value and the second value as a preferred embodiment
Frequency specifically includes:
Obtain calibration cycle and calibration error；
In the calibration cycle, it is described to judge whether the numerical error of first numerical value and the second value meets
Standard error；
If it is not, the register of the MCU clock is then adjusted, to adjust the frequency of the MCU clock.
It is understood that the size of the serial number of above steps is not meant in the various embodiments of the application
Execution sequence it is successive, the execution of each step sequence should be determined by its function and internal logic, without coping with the embodiment of the present application
Implementation process constitute any restriction.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In several embodiments provided herein, it should be understood that disclosed system, device and method can be with
It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit
It divides, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components
It can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown or
The mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, the indirect coupling of device or unit
It closes or communicates to connect, can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, each functional unit in each embodiment of the application can integrate in one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, the technical solution of the application is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can be personal computer, server or the network equipment etc.) executes the complete of each embodiment the method for the application
Portion or part steps.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. are various can store journey
The medium of sequence code.
The above, above embodiments are only to illustrate the technical solution of the application, rather than its limitations；Although referring to before
Embodiment is stated the application is described in detail, those skilled in the art should understand that: it still can be to preceding
Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features；And these
It modifies or replaces, the spirit and scope of each embodiment technical solution of the application that it does not separate the essence of the corresponding technical solution.
Claims (10)
1. a kind of micro-control unit MCU clock correcting method characterized by comprising
Target time section is determined using a reference source clock；
The counting number in the target time section is calculated using the frequency of MCU clock, is denoted as the first numerical value；
The counting number in the target time section is calculated using the frequency of a reference source clock, is denoted as second value；
The frequency of the MCU clock is adjusted according to first numerical value and the second value.
2. the method according to claim 1, wherein described according to first numerical value and the second value tune
The frequency of the whole MCU clock includes:
If first numerical value is greater than the second value, the frequency of the MCU clock is reduced；
If first numerical value is less than the second value, increase the frequency of the MCU clock.
3. method according to claim 1 or 2, which is characterized in that the frequency using MCU clock is calculated in the mesh
The counting number in the period is marked, the first numerical value is denoted as and specifically includes:
Obtain the maximum value and minimum value in the register effective range of the MCU clock；
Intermediate value is determined using dichotomy according to the maximum value and minimum value；
The register is set according to the intermediate value, obtains the frequency of the MCU clock；
The counting number in the target time section is calculated using the frequency of MCU clock, is denoted as the first numerical value.
4. method according to claim 1 or 2, which is characterized in that described to be counted according to first numerical value with described second
The frequency that value adjusts the MCU clock specifically includes:
Obtain calibration cycle and calibration error；
In the calibration cycle, judge whether the numerical error of first numerical value and the second value meets the standard
Error；
If it is not, the register of the MCU clock is then adjusted, to adjust the frequency of the MCU clock.
5. a kind of micro-control unit MCU clock alignment system characterized by comprising
Determination unit, for determining target time section using a reference source clock；
First computing unit is denoted as for using the frequency of MCU clock to calculate counting number in the target time section
One numerical value；
Second computing unit, for using the frequency of a reference source clock to calculate the counting in the target time section
Number, is denoted as second value；
Adjustment unit, for adjusting the frequency of the MCU clock according to first numerical value and the second value.
6. system according to claim 5, which is characterized in that the adjustment unit is specifically used for:
If first numerical value is greater than the second value, the frequency of the MCU clock is reduced；
If first numerical value is less than the second value, increase the frequency of the MCU clock.
7. method according to claim 5 or 6, which is characterized in that first computing unit is specifically used for:
Obtain the maximum value and minimum value in the register effective range of the MCU clock；
Intermediate value is determined using dichotomy according to the maximum value and minimum value；
The register is set according to the intermediate value, obtains the frequency of the MCU clock；
The counting number in the target time section is calculated using the frequency of MCU clock, is denoted as the first numerical value.
8. method according to claim 5 or 6, which is characterized in that second computing unit is specifically used for:
Obtain calibration cycle and calibration error；
In the calibration cycle, judge whether the numerical error of first numerical value and the second value meets the standard
Error；
If it is not, the register of the MCU clock is then adjusted, to adjust the frequency of the MCU clock.
9. a kind of computer installation characterized by comprising
Processor, memory, input-output equipment and bus；
The processor, memory, input-output equipment are connected with the bus respectively；
The processor is for executing such as the described in any item methods of Claims 1-4.
10. a kind of computer readable storage medium, is stored thereon with computer program, it is characterised in that: the computer program
It realizes when being executed by processor such as the step of any one of claims 1 to 4 the method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811384477.9A CN109283967B (en) | 2018-11-20 | 2018-11-20 | MCU clock calibration method and related equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811384477.9A CN109283967B (en) | 2018-11-20 | 2018-11-20 | MCU clock calibration method and related equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109283967A true CN109283967A (en) | 2019-01-29 |
| CN109283967B CN109283967B (en) | 2021-11-02 |
Family
ID=65176118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811384477.9A Active CN109283967B (en) | 2018-11-20 | 2018-11-20 | MCU clock calibration method and related equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109283967B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110174922A (en) * | 2019-04-15 | 2019-08-27 | 合肥格易集成电路有限公司 | A kind of calibration method and device of HSI clock frequency |
| CN111726190A (en) * | 2020-06-18 | 2020-09-29 | 四川艾贝斯科技发展有限公司 | System time calibration method for street lamp control system |
| CN111736570A (en) * | 2020-06-02 | 2020-10-02 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Controller clock frequency detection method and device, computer equipment and storage medium |
| CN113009899A (en) * | 2019-12-20 | 2021-06-22 | 金卡智能集团股份有限公司 | RTC (real time clock) calibration method for high-precision timing of metering instrument |
| CN113260129A (en) * | 2021-07-06 | 2021-08-13 | 珠海市杰理科技股份有限公司 | Synchronous flashing light control method, device, system and storage medium |
| CN113377155A (en) * | 2021-06-08 | 2021-09-10 | 深圳市汇顶科技股份有限公司 | Clock calibration method and device and electronic equipment |
| CN114138056A (en) * | 2021-11-04 | 2022-03-04 | 珠海格力节能环保制冷技术研究中心有限公司 | Display terminal clock calibration method and device and display terminal |
| CN114298075A (en) * | 2021-12-30 | 2022-04-08 | 江苏集萃智能集成电路设计技术研究所有限公司 | Ultrahigh frequency national standard reader baseband decoding method based on MCU |
| CN114397939A (en) * | 2022-01-20 | 2022-04-26 | 无锡驰翔创新科技有限公司 | Chip clock frequency trimming method, burning method and burner |
| CN116185128A (en) * | 2023-03-06 | 2023-05-30 | 珠海极海半导体有限公司 | MCU chip internal clock calibration method and circuit |
| CN117539323A (en) * | 2023-11-14 | 2024-02-09 | 深圳市航顺芯片技术研发有限公司 | MCU internal clock calibration method, system and chip based on ATE equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101552606A (en) * | 2009-04-29 | 2009-10-07 | 西安理工大学 | Intelligent self-calibration chip based on chip internal clock crystal oscillator and self-calibration method |
| CN103955257A (en) * | 2014-03-27 | 2014-07-30 | 美的集团股份有限公司 | Method and device for calibrating system clocks of single chip microcomputers, and air conditioner control system |
| CN108023589A (en) * | 2016-11-03 | 2018-05-11 | 深圳市中兴微电子技术有限公司 | A kind of transmitting frequency calibration method and circuit |
-
2018
- 2018-11-20 CN CN201811384477.9A patent/CN109283967B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101552606A (en) * | 2009-04-29 | 2009-10-07 | 西安理工大学 | Intelligent self-calibration chip based on chip internal clock crystal oscillator and self-calibration method |
| CN103955257A (en) * | 2014-03-27 | 2014-07-30 | 美的集团股份有限公司 | Method and device for calibrating system clocks of single chip microcomputers, and air conditioner control system |
| CN108023589A (en) * | 2016-11-03 | 2018-05-11 | 深圳市中兴微电子技术有限公司 | A kind of transmitting frequency calibration method and circuit |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110174922A (en) * | 2019-04-15 | 2019-08-27 | 合肥格易集成电路有限公司 | A kind of calibration method and device of HSI clock frequency |
| CN113009899A (en) * | 2019-12-20 | 2021-06-22 | 金卡智能集团股份有限公司 | RTC (real time clock) calibration method for high-precision timing of metering instrument |
| CN111736570A (en) * | 2020-06-02 | 2020-10-02 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Controller clock frequency detection method and device, computer equipment and storage medium |
| CN111726190A (en) * | 2020-06-18 | 2020-09-29 | 四川艾贝斯科技发展有限公司 | System time calibration method for street lamp control system |
| CN113377155A (en) * | 2021-06-08 | 2021-09-10 | 深圳市汇顶科技股份有限公司 | Clock calibration method and device and electronic equipment |
| CN113260129B (en) * | 2021-07-06 | 2021-11-12 | 珠海市杰理科技股份有限公司 | Synchronous flashing light control method, device, system and storage medium |
| CN113260129A (en) * | 2021-07-06 | 2021-08-13 | 珠海市杰理科技股份有限公司 | Synchronous flashing light control method, device, system and storage medium |
| CN114138056A (en) * | 2021-11-04 | 2022-03-04 | 珠海格力节能环保制冷技术研究中心有限公司 | Display terminal clock calibration method and device and display terminal |
| CN114138056B (en) * | 2021-11-04 | 2024-05-17 | 珠海格力节能环保制冷技术研究中心有限公司 | Display terminal clock calibration method and device and display terminal |
| CN114298075A (en) * | 2021-12-30 | 2022-04-08 | 江苏集萃智能集成电路设计技术研究所有限公司 | Ultrahigh frequency national standard reader baseband decoding method based on MCU |
| CN114298075B (en) * | 2021-12-30 | 2024-02-06 | 江苏集萃智能集成电路设计技术研究所有限公司 | MCU-based ultrahigh frequency national standard reader baseband decoding method |
| CN114397939A (en) * | 2022-01-20 | 2022-04-26 | 无锡驰翔创新科技有限公司 | Chip clock frequency trimming method, burning method and burner |
| CN116185128A (en) * | 2023-03-06 | 2023-05-30 | 珠海极海半导体有限公司 | MCU chip internal clock calibration method and circuit |
| CN116185128B (en) * | 2023-03-06 | 2024-05-17 | 珠海极海半导体有限公司 | MCU chip internal clock calibration method and circuit |
| CN117539323A (en) * | 2023-11-14 | 2024-02-09 | 深圳市航顺芯片技术研发有限公司 | MCU internal clock calibration method, system and chip based on ATE equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109283967B (en) | 2021-11-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109283967A (en) | A kind of micro-control unit MCU clock correcting method and relevant device | |
| US10042383B2 (en) | Navigation system and mouse device | |
| CN109067394B (en) | On-chip clock calibration device and calibration method | |
| CN109257507B (en) | Method for adjusting screen brightness, mobile terminal and storage medium | |
| CN104679098A (en) | Automatic calibration circuit for clock frequency of microcontroller | |
| CN103078697B (en) | A kind of distributed clock synchronization method | |
| CN110138402A (en) | A kind of control method, device and the mobile terminal of mobile terminal output power | |
| CN109347938B (en) | Traffic monitoring method, telephone watch, mobile terminal and server | |
| CN103955257A (en) | Method and device for calibrating system clocks of single chip microcomputers, and air conditioner control system | |
| US20200313663A1 (en) | Frequency demultiplication adjustment method of pll | |
| CN101151584B (en) | Timer circuit, mobile communication terminal using the same, and electronic device using the same | |
| US20040012415A1 (en) | Circuit for correcting deviation in oscillating frequency | |
| CN112014749B (en) | Method, device, chip and storage medium for determining battery display electric quantity | |
| US5546363A (en) | Clock apparatus for forming time information for use in computer system | |
| CN115566296B (en) | Battery power display method, electronic device, program product and medium | |
| CN109799872A (en) | Improve the method, apparatus and electronic equipment of low-res real-time clock waking-up precision | |
| CN106940665B (en) | Time correction control method and system based on mobile terminal and mobile terminal | |
| US8731042B2 (en) | Generating pulse width modulated signals | |
| CN111865306B (en) | Real-time clock time-base frequency divider and real-time clock adjusting method | |
| CN112601329A (en) | Lamplight brightness control method and related equipment thereof | |
| CN109154796B (en) | Time updating method, device and movable platform | |
| US10411717B2 (en) | Device and method for multiple reference system timer | |
| US9170602B1 (en) | Calibrating a high-speed clock signal generated using a processor internal to the electronic authentication device without using a crystal oscillator | |
| CN113552921B (en) | System time synchronization method and system for software and hardware interlocking and electronic equipment | |
| CN109413725B (en) | Method, device and equipment for prolonging service life of battery of low-power-consumption Internet of things equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |